Hello,
I posted a similar topic a while ago but still can not figure out how to switch to Developer mode and boot from a USB drive. I’m trying to do it on a model: AX211NGW.
Thank you
P.S.
I watched several YouTube videos and no luck.
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BTW, this kind of question, being related to a “peculiar” hardware family, should be asked on a forum that focuses on Chromebooks.
You may also wish to review this discussion.
Everything I have seen points to that model number being for a wifi card, not a Chromebook model.
May I suggest you take another look at the label on the bottom of your Chromebook?
I found these instructions for a Chromebook:
To access the legacy boot menu (if applicable):
1. Enter Recovery Mode:
Power off your Chromebook. Press and hold the Esc and Refresh (the circular arrow button) keys, then press the Power button.
2. Enable Developer Mode:
The device will boot to the recovery screen. Press Ctrl + D to enter developer mode.
3. Access Legacy BIOS:
Once in developer mode and at the recovery screen, press Ctrl + L to access the legacy BIOS boot menu
If that doesn’t work, there is this alternative approach:
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Yes, I was able to enable Developer Mode but there are no other options.
Does the chromebook have the inxi command?
If so, what does the following report?
inxi -ACDMNSG
If not, can you install it using the command:
sudo apt-get install inxi
Also, what is the Make and Model of your chromebook?
AX211NGW is the Intel Radio => WiFi transmitter/receiver.
The computer model is TPN-Q294 which, from lookup, is reported to be
Please confirm if that is the correctly identified product?
If so there are some videos available there at the bottom, under "Related documents and videos". Click on the button for “Computer System”, then click on “Memory & BIOS”, and you will see the video on “How to open the BIOS …”
You probably should have a look at the following as well:
or even
I would like to suggest having at look at the advice offered when you perform the following Google search:
If all that fails, you may need to approach someone on an HP-specific forum to get you to the point where you can get to install any Linux on your box.
Note: Sadly, many newer chromebooks require the ability to tiddle around with the firmware to disable the write protected mode that is factory set. The original mindset of manufacturers was to allow a simple hardware switch which was either a physical two position switch inside the case away from prying fingers or the removal of a physical write protect screw from a special point inside the case. If you know how this is done on some of the newer models contact me and lets discuss modifying this guide to be more complete for the newer models of chromebooks now coming out.
If you need to get into the insides of your computer, the source of the above quote actually gives some detailed instructions on what to do, if you are willing to try it yourself. Otherwise, you may need to go to a repair shop to have them “move the screws” safely for you. 
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